This is a build I made from , I think, 3 different build that werent usable after the pure strat update.
Basically you can do this with 6k stats on warden, 6k app and 5.5k hermit. Probably can go lower because I never really faced any issues. The only issue is when your TB monk loses his TB at 2k enemies when Djinns start appearing , so I remedied that by disabling my TB at around 1.2k enemies and then reactivating it again. Also I use summoner with 2 huntress guardians. You can even afk it with 2 summoners if you have higher stats, and you can do without minions. They are there for my security but they never really mattered.
1) The auras are placed on a flower pot on a ledge besides the road.
2) Only 3 cloud towers because then next one costs too much DU
I start at wave 22, upgrade everything in that wave and switch to summoner and TB monk.